'I want to know what happened to my son before I die,' victim's mother says.

Exactly five years after her son was fatally shot outside a birthday party on the West Side, the teen's mother and other relatives visited the scene of the crime.

“We were just sitting there, talking about the memories that we had with him, the things that we would do,” said Patricia Lozano, 48. “Now, I'm on dialysis, and I never know how long I have. I want to know what happened to my son before I die.”

Sunday marked the fifth anniversary of the death of Joe Trevino, who was 17 when he was shot and killed in the 300 block of Landa Avenue.

Police said Trevino was outside the home with friends when two men walking away from the party fired at him.

A Crime Stoppers news release said Trevino and the other men didn't know each other.

Lozano said she believes Trevino's friends know who killed her son, and hopes a $5,000 reward from Crime Stoppers will encourage tipsters.

Anyone with information is asked to call 210-224-7867, or text “Tip 127” plus the tip to 274637.

“I hear stories from other people about what happened,” she said. “I hope they find it in their hearts to finally speak up.”

The past few years have been difficult for her and Trevino's seven siblings, who buried the teen on what would have been his 18th birthday.

He always enjoyed the holidays, his mother said, and loved camping and playing basketball with friends.

Lozano said her son was working to get his GED.

“I see a kid that resembles him, and I think, ‘Wow, that's what Joe would look like at that age,'” she said. “It's hard without having any closure.”